Use of 'I' in python

Question

I have another doubt

There are usually many "i" that I come over. Can you explain it's significance in python

Ex

Letters = [a,b,c]
for I in Letters:
print(I)

Output:
a
b
c

Can I know how this all works ??

Answer 1

There's more to it than meets the eye (pun intended)

In a more traditional language you might have pseudo code like this.

letters = ['a', 'b', 'c'];
Int count;
chr tempVar;
for (count = 0; count <len(letters) ; count++) {
tempVar = letters[count];
printf(tempVar);
}

Python is doing all of this in the background
if in Python you say
for this in that:
It returns each element in that as the temp variable this.

So to make your prog more readable you would say

for letter in letters:

i is just the name of the temp variable, it could be any allowable word.

Answer 2

First know that this can be x,y,z or anything like we love to use variable x in mathematics. So, first we replace i/I to another variable.

Letters = ['a','b','c']

"""Here we declared a variable Letters which inherits a list and the list have 3 elements"""

for z in letters:
print(z)

"""This is iteration. Means for every element in Letters, print that element"""

So, then we get the elements one by one in the output.

Note that your code will get a ValueError because you did not declared a, b, c as strings.

write, Letters = ['a','b','c'] for instance.

Answer 3

The for loop loops over an iterable, anything that has more than one element, like a list, tuple, string...

for l in letters:
print(l)

This means that l successively becomes each letter from letters.

This is the same as if you wrote:

l = letters[0]
print(l)
l = letters[1]
print(l)
l = letters[2]
print(l)

For more details, you can also look here:

https://code.sololearn.com/cSdiWZr4Cdp7/?ref=app

Answer 4

You may find answer in https://docs.python.org/2.3/whatsnew/section-slices.html

Answer 5

The i is normally used as iterator on a for sentence. That is why it is called i.
For example:
for i in range(5):
print(i)

Here the i is first 1, then 2, 3, and 4.

letters=[“a”,”b”,”c”,”d”]
for i in letters:
print(i)

Here, the i would be a, then b, c and d

Answer 6

letters=["a","b","c"] # you have entered three letters in a list data type
for l in letters: # {l} will take the value from letters firstly it will take [a] then [b] and then [c]
print(l) # print one by one